def _get_impl():
"""Delay import of rpc_backend until configuration is loaded."""
global _RPCIMPL
if _RPCIMPL is None:
try:
_RPCIMPL = importutils.import_module(CONF.rpc_backend)
except ImportError:
# For backwards compatibility with older nova config.
impl = CONF.rpc_backend.replace('nova.rpc',
'nova.openstack.common.rpc')
_RPCIMPL = importutils.import_module(impl)
return _RPCIMPL
def _get_impl():
"""Delay import of rpc_backend until configuration is loaded."""
global _RPCIMPL
if _RPCIMPL is None:
try:
_RPCIMPL = importutils.import_module(CONF.rpc_backend)
except ImportError:
# For backwards compatibility with older nova config.
impl = CONF.rpc_backend.replace('nova.rpc',
'nova.openstack.common.rpc')
_RPCIMPL = importutils.import_module(impl)
return _RPCIMPL
def __init__(self, backend_mapping=None):
if backend_mapping is None:
backend_mapping = {}
backend_name = CONF.database.backend
# Import the untranslated name if we don't have a
# mapping.
backend_path = backend_mapping.get(backend_name, backend_name)
backend_mod = importutils.import_module(backend_path)
self.__backend = backend_mod.get_backend()
def __init__(self, backend_mapping=None):
if backend_mapping is None:
backend_mapping = {}
backend_name = CONF.database.backend
# Import the untranslated name if we don't have a
# mapping.
backend_path = backend_mapping.get(backend_name, backend_name)
backend_mod = importutils.import_module(backend_path)
self.__backend = backend_mod.get_backend()
def _import_module(mod_str):
try:
if mod_str.startswith('bin.'):
imp.load_source(mod_str[4:], os.path.join('bin', mod_str[4:]))
return sys.modules[mod_str[4:]]
else:
return importutils.import_module(mod_str)
except Exception as e:
sys.stderr.write("Error importing module %s: %s\n" % (mod_str, str(e)))
return None
def _get_drivers():
"""Instantiate, cache, and return drivers based on the CONF."""
global _drivers
if _drivers is None:
_drivers = {}
for notification_driver in CONF.notification_driver:
try:
driver = importutils.import_module(notification_driver)
_drivers[notification_driver] = driver
except ImportError:
LOG.exception(_("Failed to load notifier %s. "
"These notifications will not be sent.") %
notification_driver)
return _drivers.values()
def _get_drivers():
"""Instantiate, cache, and return drivers based on the CONF."""
global _drivers
if _drivers is None:
_drivers = {}
for notification_driver in CONF.notification_driver:
try:
driver = importutils.import_module(notification_driver)
_drivers[notification_driver] = driver
except ImportError:
LOG.exception(
_("Failed to load notifier %s. "
"These notifications will not be sent.") %
notification_driver)
return _drivers.values()
def add_driver(notification_driver):
"""Add a notification driver at runtime."""
# Make sure the driver list is initialized.
_get_drivers()
if isinstance(notification_driver, basestring):
# Load and add
try:
driver = importutils.import_module(notification_driver)
_drivers[notification_driver] = driver
except ImportError:
LOG.exception(_("Failed to load notifier %s. "
"These notifications will not be sent.") %
notification_driver)
else:
# Driver is already loaded; just add the object.
_drivers[notification_driver] = notification_driver
def deserialize_remote_exception(conf, data):
failure = jsonutils.loads(str(data))
trace = failure.get('tb', [])
message = failure.get('message', "") + "\n" + "\n".join(trace)
name = failure.get('class')
module = failure.get('module')
# NOTE(ameade): We DO NOT want to allow just any module to be imported, in
# order to prevent arbitrary code execution.
if module not in conf.allowed_rpc_exception_modules:
return RemoteError(name, failure.get('message'), trace)
try:
mod = importutils.import_module(module)
klass = getattr(mod, name)
if not issubclass(klass, Exception):
raise TypeError("Can only deserialize Exceptions")
failure = klass(*failure.get('args', []), **failure.get('kwargs', {}))
except (AttributeError, TypeError, ImportError):
return RemoteError(name, failure.get('message'), trace)
ex_type = type(failure)
str_override = lambda self: message
new_ex_type = type(ex_type.__name__ + _REMOTE_POSTFIX, (ex_type, ), {
'__str__': str_override,
'__unicode__': str_override
})
new_ex_type.__module__ = '%s%s' % (module, _REMOTE_POSTFIX)
try:
# NOTE(ameade): Dynamically create a new exception type and swap it in
# as the new type for the exception. This only works on user defined
# Exceptions and not core python exceptions. This is important because
# we cannot necessarily change an exception message so we must override
# the __str__ method.
failure.__class__ = new_ex_type
except TypeError:
# NOTE(ameade): If a core exception then just add the traceback to the
# first exception argument.
failure.args = (message, ) + failure.args[1:]
return failure
def deserialize_remote_exception(conf, data):
failure = jsonutils.loads(str(data))
trace = failure.get("tb", [])
message = failure.get("message", "") + "\n" + "\n".join(trace)
name = failure.get("class")
module = failure.get("module")
# NOTE(ameade): We DO NOT want to allow just any module to be imported, in
# order to prevent arbitrary code execution.
if module not in conf.allowed_rpc_exception_modules:
return RemoteError(name, failure.get("message"), trace)
try:
mod = importutils.import_module(module)
klass = getattr(mod, name)
if not issubclass(klass, Exception):
raise TypeError("Can only deserialize Exceptions")
failure = klass(*failure.get("args", []), **failure.get("kwargs", {}))
except (AttributeError, TypeError, ImportError):
return RemoteError(name, failure.get("message"), trace)
ex_type = type(failure)
str_override = lambda self: message
new_ex_type = type(
ex_type.__name__ + _REMOTE_POSTFIX, (ex_type,), {"__str__": str_override, "__unicode__": str_override}
)
new_ex_type.__module__ = "%s%s" % (module, _REMOTE_POSTFIX)
try:
# NOTE(ameade): Dynamically create a new exception type and swap it in
# as the new type for the exception. This only works on user defined
# Exceptions and not core python exceptions. This is important because
# we cannot necessarily change an exception message so we must override
# the __str__ method.
failure.__class__ = new_ex_type
except TypeError:
# NOTE(ameade): If a core exception then just add the traceback to the
# first exception argument.
failure.args = (message,) + failure.args[1:]
return failure
def __get_backend(self):
"""Get the actual backend. May be a module or an instance of
a class. Doesn't matter to us. We do this synchronized as it's
possible multiple greenthreads started very quickly trying to do
DB calls and eventlet can switch threads before self.__backend gets
assigned.
"""
if self.__backend:
# Another thread assigned it
return self.__backend
backend_name = CONF.database.backend
self.__use_tpool = CONF.database.use_tpool
if self.__use_tpool:
from eventlet import tpool
self.__tpool = tpool
# Import the untranslated name if we don't have a
# mapping.
backend_path = self.__backend_mapping.get(backend_name, backend_name)
backend_mod = importutils.import_module(backend_path)
self.__backend = backend_mod.get_backend()
return self.__backend
def __get_backend(self):
"""Get the actual backend. May be a module or an instance of
a class. Doesn't matter to us. We do this synchronized as it's
possible multiple greenthreads started very quickly trying to do
DB calls and eventlet can switch threads before self.__backend gets
assigned.
"""
if self.__backend:
# Another thread assigned it
return self.__backend
backend_name = CONF.database.backend
self.__use_tpool = CONF.database.use_tpool
if self.__use_tpool:
from eventlet import tpool
self.__tpool = tpool
# Import the untranslated name if we don't have a
# mapping.
backend_path = self.__backend_mapping.get(backend_name,
backend_name)
backend_mod = importutils.import_module(backend_path)
self.__backend = backend_mod.get_backend()
return self.__backend
def __init__(self):
self.db = importutils.import_module(CONF.db_driver)
def __init__(self, hashtype='SHA256'):
self.hashfn = importutils.import_module('Crypto.Hash.' + hashtype)
self.max_okm_length = 255 * self.hashfn.digest_size
def __init__(self, enctype='AES', hashtype='SHA256'):
self.cipher = importutils.import_module('Crypto.Cipher.' + enctype)
self.hashfn = importutils.import_module('Crypto.Hash.' + hashtype)
def __init__(self, hashtype='SHA256'):
self.hashfn = importutils.import_module('Crypto.Hash.' + hashtype)
self.max_okm_length = 255 * self.hashfn.digest_size
def __init__(self, enctype='AES', hashtype='SHA256'):
self.cipher = importutils.import_module('Crypto.Cipher.' + enctype)
self.hashfn = importutils.import_module('Crypto.Hash.' + hashtype)
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from alembic import context
from logging import config as logging_config
from savanna.openstack.common import importutils
from sqlalchemy import create_engine, pool
from savanna.db import model_base
importutils.import_module('savanna.db.models')
config = context.config
savanna_config = config.savanna_config
logging_config.fileConfig(config.config_file_name)
# set the target for 'autogenerate' support
target_metadata = model_base.SavannaBase.metadata
def run_migrations_offline():
context.configure(url=savanna_config.database.connection)
with context.begin_transaction():
context.run_migrations()
# limitations under the License.
#
# Based on Neutron's migration/cli.py
from __future__ import with_statement
from alembic import context
from logging import config as c
from sqlalchemy import create_engine
from sqlalchemy import pool
from savanna.db.sqlalchemy import model_base
from savanna.openstack.common import importutils
importutils.import_module('savanna.db.sqlalchemy.models')
# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
savanna_config = config.savanna_config
# Interpret the config file for Python logging.
# This line sets up loggers basically.
c.fileConfig(config.config_file_name)
# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = model_base.SavannaBase.metadata
def __init__(self):
self.db = importutils.import_module(CONF.db_driver)
# limitations under the License.
#
# Based on Neutron's migration/cli.py
from __future__ import with_statement
from logging import config as c
from alembic import context
from sqlalchemy import create_engine
from sqlalchemy import pool
from savanna.db.sqlalchemy import model_base
from savanna.openstack.common import importutils
importutils.import_module('savanna.db.sqlalchemy.models')
# this is the Alembic Config object, which provides
# access to the values within the .ini file in use.
config = context.config
savanna_config = config.savanna_config
# Interpret the config file for Python logging.
# This line sets up loggers basically.
c.fileConfig(config.config_file_name)
# add your model's MetaData object here
# for 'autogenerate' support
# from myapp import mymodel
# target_metadata = mymodel.Base.metadata
target_metadata = model_base.SavannaBase.metadata
